Croft



(No Model.)

J. R. MEADOWCROFT.

VALVE.

Patented Mar. 12, 1895.

ga -I? I NITED STATES PATENT Erica JOHN ROBERT MEADOWCROFT, OF MONTREAL, CANADA.

VALVE.

$PEGIFICATION forming part of Letters Patent No. 535,766, dated March 1 2, 1895.

Application filed April 29,1891. Serial No. 391,018. (No model.) Patented in Canada May 5, 1891, No. 36,544-

.Z'o aZZ whom it may concern.-

Be it known that I, JOHN ROBERT MEADOW- CROFT, of the city of Montreal,in the district of Montreal, and Province of Quebec, Canada, have invented certain new and useful Improvements in Valves, (for which I have obtained a patent in Canada, No. 36,544, dated May 5, 1891 and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention applies specially to gate valves but can with advantage replace several others of well known type. Its object is to simplify and cheapen the construction of the valve to secure rapidity of movement in closing and opening to render the working of the valve possible in varying positions and to eifect a more perfect closure of same.

The invention also embraces a feature of construction which allows of the interchangeability of some of its parts to renderthe handling of the valve convenient under certain circumstances.

The invention consists in providing a rack on the sliding disk or valve proper setting such valve proper in guide ways and arranging a pinion in place on a turn spindle to engage the rack so that bya partial turn of such spindle the valve proper willbefully opened or closed and pressure withstood from either direction.

For full comprehension however of the invention reference must. be had to the annexed drawings, forming partof this specification, in which like symbols indicate corresponding parts, and wherein Figure l is a transverse vertical section of valve chamber showing valve proper and turn spindle in elevation; Fig. 2, a longitudinal vertical section of the valve proper and its chamber taken at right angles to Fig. 1 and Fig. 3, a plan view of the complete valve with top cap removed.

A A are respectively the inlet and outlet ends of the passage through the valve of any usual form, B being the intermediate portion of such valve which is formed with a chamber C at right angles to the passage extending out beyond one side of same as usual and having an open head 0' (covered by a cap 0 to allow of the insertion and play of the valve proper D. Guideways D D for such valve proper are formed in the chamber between the back side 0 thereof and ribs 0 on the sides, such back sides having its surface beveled to correspond with the beveled surface of one side of the valve proper which is so shaped for the purpose of allowing plumbago or asbestos disks to be used on its face if desired.

The opposite side of the valve proper has a rack D formed on it of a width which leaves surfaces for sliding on the ribs 0 and the side 0 of the chamber which is opposite the back side 0 thereof and beyond the passageway of the valve is curved to correspond with circular perforated and screwed bosses E E which receive nuts or caps E E in which bearings for the turn spindle F are formed this spindle extending transversely to the passage way of the valve but out of the line of same and carryinga pinion F to mesh with the rack D on the valve proper. This duplicate arrangement of bosses andcaps allows the turn spindle to be inserted from either side of the valve so that the inconvenient location of its handle or wheel between the line of piping and a wall, as would not infrequently happen when the pressure in the pipes is in acertain direcand transverse bosses E E on both sides of the valve with caps E E attached to same to form bearings for said turn spindle, as set forth.

Montreal, 14th day of April, 1891.

JOHN ROBERT MEAD OWGROFT.

Witnesses: V

WILL. P. MCFEAT, FRED. J. SEARS. 

